13x-10=7x+2

6x-12 = 0

6x = 12

x = 2

19-15(x-2)=26-8x

раскроем скобки

19-15x+30 = 26-8x

-7x+23 = 0

7x-23 = 0

7x = 23

x = 23/7

х=3,28571428571